

import java.util.Scanner;

public class Test07 {
    public static void main(String[] args) {
//        String[] x = new String[10];
//        try {
//            x[10] = "x";
//        }catch(ArrayIndexOutOfBoundsException e){
//            System.out.println("数组越界了");
//        };
//        x[10] = "x";
        Scanner sc = new Scanner(System.in);
        double  a = sc.nextDouble();
        double  b = sc.nextDouble();
        System.out.println("a"+a);
        System.out.println("b"+b);
    }
}
